ICD-9-CM Vol. 1 Diagnostic Codes

16. SYMPTOMS, SIGNS, AND ILL-DEFINED CONDITIONS (780-799)

section notes

SYMPTOMS (780-789)

section notes

784 Symptoms involving head and neck

section notes

784.4 Voice and resonance disorders

section notes
784.40   Voice/resonance dis NOS
784.41   Aphonia
784.42   Dysphonia
784.43   Hypernasality
784.44   Hyponasality
784.49   Voice/resonance dis NEC
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